Front brakes locking up

I have new rotars,new calipers,new booster,new master cylinder,new brake lines,new shoes,and after months of mechanic telling me go get all these parts,the truck is no better,still locks up and I have to release the fluid from the calipers so I can continue.Mechanic said he replaced a pressure relieve valve but he took it off an old truck of his.My truck is a 85 chevy and im thru with this mechanic and need some better direction.

1 Answer

Best not to blame the messenger. Your mechanic was correct in the path to determine cause
of this issue. How much pedal you have before this happens? It's happening straight away or
just intermittently?

I have a 1996 Chevy 1500 1/2 ton 2wd with 4.3 v6, was driving and went to
stop and the pedal went to the floor. Checked fluid it was full, with the truck not
running pumped the brakes and it firmed ...

start truck - warms up to 190 stat open gauge drops and goes back up to about 165 to 170 then swings back down this keeps on repeating. radiator has been changed stat has been changed. Gas consumption...

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